>> you know was fascinating when i read this because cb moten johnson, michelle obama's great-grandmother lived in height harkin that was the big deal because she lived not far from where the obama's live today. someone had recommended to me the chicago commission study of the race riots. when i was going through their and i discovered these bombings african-americans were moving into hyde park and there was this active concerted campaign to move them out. i realized, my goodness. >> it wasn't parlor conversation. it was vicious propaganda. >> it was remarkable. and i can't remember now exactly how many there were, but these bombings -- >> about 50 a. >> they began before and continued after and again i don't know -- >> was at a planned activity in hyde park? >> was a really striking time. it was the first that i knew about it. i didn't know about that and in talking to the obama's relatives i learned that phebe had talked about it, that she when the riots were sweeping the city she was by herself. her husband traveled as an itinerant minister and was often away. she got a pot full of wat